Banding machine



1 192 March 7 v. D. BARKER BANDILEG MACHINE Filed June 14, 1923 2 Shees-$heet 1 INVENTQR W y/7 fl Ear/ref? (/jwgwssseg:

' ATTORNEY V. D. BARKER March 15, 1927.

BANDING MACHI NE Filed June 14, 1923 2 Sheets-Sheet 2 Fig 3.

. INVENTOR wry/7 D, Bar/fen WITNESSES: Xvi flaw Patented Mar. is, 1927;

barren STATES PATENT orr cs.

VIRGIL 1). BARKER, or vrILKiNsBURe,-. rnnnsynviiivra, ASSIGNOR To wnsurma HOUSE ELECTRIC & MANUFACTURING ooinraivnn CORPORATION OF PENNSYL- VANIA.

BANDING MACHINE.

ApplicatiOn filed June 14, 1923. 7 Serial No. 645,4?3.

My invention relates to banding machines, more especially to machines for handing the rotors of dynamo-electric mach nes w th banding material, such as steel wire, which is a common expedient in the manufacture thereof.

It is among the objects of this invention to provide a device for handing armatures and the like for dynamo-electric maclnnes which shall be of simple mechanical construction, and which shall be adapted for the banding of steel wire on rotating bodies at a uniform tension irrespective of variations in the periphery of the bodies belng wound.

Various types of bandingmachineshave been proposed heretofore embodying different principles of mechanical or pneumatic operation to provide uniform tension or constant rate of feeding of the bandin wire. These devices accomplish their ob ect to some degree which however, falls 'short of practical application to a manufacturing basis.

My present application banding device which embodies mechanical just themselves to maintain a constantrate of feed and uniform tensionon the banding material. My mechanism is designed to vary the tension desired on the-banding material and to automatically maintain such tension within practical limits during the operation of applying the material. I g

In the accompanying drawings, constituting a part hereof and in .which'like referis directed to a simple ence characters designate like parts,

F'gure 1 is a side elevational view, partially in outline, illustrating a banding machine embodying the principle of my invention,

Fig. 2 is a side elevational view of a portion of the machine showing a modification of the feed mechanism, and V Fig. 3 is an end elevational view thereof.

Referring to Fig. 1, the device consists of a bed 1 mounted upon verticalpedestals 2 and having a head-stock and a tail-stock 3 and 4,-res'pectively, mounted thereon. A shaft 5 is journaled in the pedestals 2 parallel with the centers of the head-stock and tail-stock and operatively connected at one end to the former by a chain drive mechanism 6. A fulcrum arm 7 extending vertically fromthe bed 1, is'associated therewith features'that automatically ad-- and is provided at its upper entremitywith a hinge bolt 8 upon which a fulcrum lever 9 ,is mounted. A feed cone 10 is adjustably A secured on the shaft 5 in cooperative alinement with a shifting bracket 11 provided guide wheel 13.

The shifting bracket 11 is hinged to a' 1 bell crank 14 pivoted on'an extended portion 15 of the fulcrum arm- 7 and theothcr end of the bell crank 14L- is secured to a vertical link 16 pivoted at one end of the "fulcruin' lever 9. A wire guide wheel 17 is rotatably mounted on a vertically extending bracket 18, movably mounted on'the bed and associated with a sheave or guide'wheel 19 rotatably mounted in the end of the;

lover 9.

The lever 9 is provided with graduations 21 which indicate the lever arm for an adjustable counter-weight 22 from the fulcrum position 8; A stop 23 mounted ona vertical pedestal 24: is secured to the top of the bed -1 to limit the movement of the lever 9. A rotor, such as an armature 25, is rotat-' A friction guide 30 comprising a spring supported clamping block adapted to frictionally engage the banding wire 31 is secured to the; fulcrum support 7 in 'alinement with the guide wheel 13. The banding wire 31 is taken from the reel 28,pa's'sed through the friction guide block 30 around the guide wheel 13 from which it is coiled around the cone. 10 thence about the upper guide wheel .13, the wheel 19 and the wheel 17 respec tively, to the armature 25.

In Fig. 2 is illustrated a modification in which the feed cone 10 is mounted directlyon the spindle of'th'e head stock 3, thus as-z suring a more positive connection between the cone'and the armature 25 to be banded.

The means for feedingthe wire 31 to the cone and taking it off is similar to thatillustrated in Fig. 1 with the exception that the movable guide bracket 11 carrying the guide wheels 13 is shifted to'the-end portion of the bed 1' and "is secured in alinement with the cone. The bell'crank l4 'may be connected 60 with offset portions 12 each carrying a wire to the movable bracket 11 by means of a link, and the wire taken off the vcone 10 is passed around the wheel 19 on the end of the fulcrum lever 9, over the guide wheel 17 and is wound on thearmature 25.

The operation of my device is briefly as follows: The spindle of the head-stock is actuated by a suitable prime mover, such as a motor or the like, to rotate the armature which winds the banding wire 31 around its outer periphery against the tension applied by the counter weight 22 and the feed cone 1O. The wire passing from the supply reel 28 through the friction block 30 is placed under initial tension before it is wrapped around the cone 10. The value of this initial tension depends upon the coefiicient of friction and the angle of wrap. Thefinal tension on the banding wire is maintained at a constant value within certain limits of initial tension variation, the maximum tension not exceeding twice the banding tension, when the ratio of the initial tension to-the final tension is from one tenth to one fourth with approximately one turn of Wire on the cone. This ratio may be maintained without variation of the final or banding tension. I I The loading device comprising the counter-Weighted lever arm 9 maintains a constant lineal feed of the wire 31 relative to the peripheral speed of the armature and any variation on the diameter of the latter is compensated for by the automatic shifting of the guide bracket 11 through the link 16 and bell crank 14 which located the Wire 31 on a corresponding diameter of the feed cone 10. V

The ratio of the peripheral speeds of the armature 25 and the feed cone 10 must be one to one and this may be obtained by suitable change gears between the spindle of the head-stock 3 and the shaft 5 or by providing a cone 10,,Fig. 2, and utilizing a portion that is of approximately the same diameter as the armature 25- p v The modificationillustrated in Fig. 2 is perhaps the most'practical design as it is possible to obtaina connection between the feed cone and the armature to be banded which prevents any possibility of backlash.

It is evident from the above description of my invention, a banding device made in accordance therewith provides ample means for banding motor armatures and the like 'in an eflicient and, expedient manner at a uniform tension and constant rate of speed within certain limits. Such a machine is especially adapted to manufacture in production quantities where a large number of like units having irregular contours require banding. V 1

Although I have described aspecific embodiment of my invention, it will be obvious to those skilled in the art that various 1nodi-- neainaa lications may be made in the details of construction without departing from the princi- 7 comprising a fulcrum lever having an ad-' justable weight and a linked connection with a wire guide shifting device which is associated with. a feed cone. I

2. A. wire-banding device, comprising means for rotatably mounting a body torbe banded,wire guide and feed means therefor and means for regulating the tension of said wire, said, feed means being automatically adjustable to variations in the diameter of the body being banded.

A wire-banding device comprising means for rotatably mounting a body to be handed, wire guide and feed means therefor, said guide means including a shifting bracket which is adapted to adjust said feed means shifting ofthe banding wire on the feed to compensate for variations in the diameter of the body being banded.

4. A wire-banding device comprising a base, a head-stock and a tail-stock mounted thereon, a feed shaftjournalled in said base andoperatively connected to the head stock spindle, a feed cone mounted on'said feed shaft, a fulcrum arm extending vertically from and secured to said base, a lever pivotally mounted on said arm, a counterweight movably mounted on'the other end of said lever, a plurality of wire guide wheels as sociated with said lever and cone, a bell crank connected 7 to some of said guide wheels, a link connecting said crank and said lever and means for actuating said head stock. I

5. A wire-banding device comprising a base, a head-stock and a tail-stock mounted thereon, a feed shaft journ'alled in said base anc operatively connected. to the head stock spindle, a feed cone mounted on said feed shaft, a fulcrum arm extending vertically from and secured to said base, a graduated lever pivotally mounted on said arm, a counterweight movably mounted on the end of said lever, a stop mounted on said base for engaging said lever, a plurality of wire guide wheels associated with said lever and cone, a bell crank connected to some of said guide wheels, a link connecting said crank and said lever and means for actuating said head-stock.

6. A wire-banding device comprising a base, means for rotatably mounting a rotor to be banded thereon, a plurality wire guide Wheels in cooperative alinement With said rotor, a feed cone associated with said Wheels, a tension adjusting mechanism mounted on said base, means for producing an initial tension on the banding Wire and automatic means for maintaining constant lineal speed of feeding the Wire relative to the peripheral speed of said rotor.

In testimony whereof, I have hereunto subscribed my name this 6th day of June,

VIRGIL D. BARKER. 

